Listen To B1A4 Sandeul's Newly Released Song "Smile Box" By Staff Reporter Jul 03, 2020 slide 2 of 6 Photo: B1A4 Facebook Photo: B1A4 Facebook Photo: B1A4 Facebook Photo: B1A4 Facebook Photo: B1A4 Facebook Photo: B1A4 Facebook Photo: B1A4 Facebook Listen to B1A4 Sandeul's newly released song "Smile Box."